2009 BMW X5 M and the 2009 BMW X6 M

Both models are powered by a newly-developed 4.4-liter V8 M engine delivering 555 hp at 6,000 rpm and 500 lb-ft of torque from 1500 to 5,650 rpm. This new M engine is the world’s first with a pulse-tuned exhaust manifold encompassing both rows of cylinders combined with high-performance twin-scroll twin turbo technology. [Read more...]